Bosch potted horns and snail horns are unique to help ensure safe driving of vehicles around the world. As early as 100 years ago, Bosch applied for a patent for its first electronic bowl-shaped horn in Germany. Once the Bosch horn was introduced, its reliable technology made it highly praised by car users. Today, Bosch supplies a wide range of basin-shaped horn and snail horn products for motorcycles, cars and commercial vehicles . These products are not only reliable, durable, but beautifully designed. On April 12, 1914, Robert Bosch Co., Ltd. filed a patent application for an electronic bowl-shaped horn. During the development process, Bosch hopes to increase the sound quality and sound quality of the horn while extending the propagation distance of the pot-shaped horn sound. The horn must be sounded immediately after activation. In addition, low power consumption and exquisite design are also essential. The new Bosch basin loudspeakers that were introduced in 1921 met all of the above requirements. The pot-shaped horn uses the "closed-pipe" principle of the organ tube structure, which means that the upper end of the sound tube is closed, so the sound produced is lower than the open tube. Bosch pot horns cleverly applied this principle, making the sound more beautiful and unique. Pot-shaped speaker eight-sided sound, snail horn polyphony into bundles Since the patent was acquired 100 years ago, the original design principle of Bosch's potted horns has been used up to now. The basin-shaped horn makes use of the electric diaphragm to make a sound and spread it in all directions. Bosch has now added a series of snail horns. The horns of the snail horns are calibrated and pitched precisely. At the same time, the diaphragm sound technology makes the sound soft and sweet. But unlike potted horns, snail horns sound in one direction. Now, on the roads all over the world, you can hear sweet sounds from Bosch basin speakers and snail horns. Providing a full range of automotive horn products for the Chinese market Bosch offers various types of basin-shaped horns and snail horns in the Chinese market, including H3F series snail horns that represent Bosch's advanced technology in speakers, EC9 and EC9C series snail horns on European market high-end cars, and Japanese and Korean cars. H2D potted horn. At the same time, Bosch snail horns cover all the passenger cars on the Chinese market, and the basin-shaped horn covers all passenger cars and commercial vehicles. Simply replace the horn itself, or make minor modifications to the cable, and the owner will be able to enjoy the stable and pleasing sound of the Bosch horn.
Chilled Water Air Handling Unit
Water chilled type, equipped with Air Cooled Water Chiller or Water Cooled Chiller to cool, heat the target and at the same time to purity the air, which will make people feel comfortable.
Amrta patented air handling unit uses our newly developed patented structure; mainly constructed with air filter, heat exchanger, fan motor, fan blower and other main components; it can meet with different external pressure requirements; tight unit structure, light unit weight and good cooling/heating performance. Direct paneling assembly structure and the frame is made of patented alloy aluminum constructed structure, joined together as a cabinet frame system. Not only ensure the cabinet is air fight, but also eliminate thermal bridge and enhance the rigidity and strength of the unit. The products are of small size, low noise hence it Is widely applied in the comfortable Air Conditioning system such as the hotel, commercial building, office and underground railway application.
Chilled Water Air Handling Unit Chilled Water Air Handling Unit,Chilled Water Fresh Air Handling Unit,Recovery Chilled Water Air Handling Unit,Heat Chilled Water Air Handling Unit Jinan Amrta Air Conditioning Co.,Ltd , http://www.amrtaac.com
1921 Bosch Speaker Advertising 
1925 Bosch Horn for Mercedes-Benz
Operation & Maintenance
1.Before the unit operation, check the water pipe valves system and duct equipment. Make sure everything is under good condition.
2. Check the fan motor and blower moving parts regularly for their connection, operation and rotating direction. Readjust it if necessary.
3. Air filter cleaning should be carried out every month before and during operation.
4. During winter, coil water should be drained out if not operating. If the unit needs to operate during winter time, make sure when the unit stops running, the coil water must circle the system and the fresh air damper must be closed to prevent coil freezing. If the unit stops operation for a long duration, coil water must be drained out.
5. Clean soft water must be used for chilled water and hot water system. Every year, wafer chemical treatment must be performed to eliminate the contamination in the system and apply compressed air or wafer for cleansing the fin coil surface, drain pan and U-trap bend.
6. Regular checking must be performed for the motor bearing lubrication condition and belt tightness.
